Executive Editor: Peter Trafton, Michael Baumgaertner

Authors: Peter Kloen, David Ring

Proximal forearm Ulna, extraarticular, avulsion of triceps insertion

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1 Cleaning of the fracture site top

Triceps reinsertion enlarge

Expose the fracture ends and the triceps tendon with minimal soft tissue dissection.

Identify the torn triceps tendon and its expansions.

Remove hematoma and irrigate.

Direct reduction of bone fragments and triceps insertion will follow.

2 Positioning and approach top


This procedure is normally performed with the patient either in a lateral position or in a supine position for posterior access.



For this procedure a posterolateral approach is normally used.

3 Tendon preparation top

Triceps reinsertion – Tendon preparation enlarge

The fracture fragments and triceps are repaired with heavy sutures into the ulna.

Insert one Nr. 5 Mersilene or other non-absorbable suture through the avulsed fragment and make a crisscrossed locking stitch (Krackow suture) into one side of the tendon.

Pass the suture to the other side of the tendon and make another crisscrossed locking stitch back down the tendon and through the avulsed fragment.

4 Tendon reinsertion top

Triceps reinsertion – Tendon reinsertion enlarge

Make two parallel holes into the olecranon through the fracture site, directed through the posterior cortex of the ulna.

Triceps reinsertion - Sutures enlarge

Pass a suture through each hole. Carefully reduce the avulsed fragment with the tendon by pulling the sutures.

Tie the knot with the elbow in 45 degrees of flexion.

Additional sutures may add support to triceps expansion and/or periosteum.

Triceps reinsertion – Check of stability enlarge

Observe the repair for stability with the elbow flexed.

Close the wound in layers.

v2.0 2018-04-30